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The Single UNIX &reg; Specification, Version 2<br>
Copyright &copy; 1997 The Open Group

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<h4><a name = "tag_000_010_716">&nbsp;</a>NAME</h4><blockquote>
wctype.h - wide-character classification and mapping utilities
</blockquote><h4><a name = "tag_000_010_717">&nbsp;</a>SYNOPSIS</h4><blockquote>
<pre><code>

#include &lt;wctype.h&gt;
</code>
</pre>
</blockquote><h4><a name = "tag_000_010_718">&nbsp;</a>DESCRIPTION</h4><blockquote>
The
<i>&lt;wctype.h&gt;</i>
header defines the following data types through
<dl compact>

<dt><b>wint_t</b><dd>As described in
<i><a href="wchar.h.html">&lt;wchar.h&gt;</a></i>.

<dt><b>wctrans_t</b><dd><index term="data type, wctrans_t"></index>
A scalar type that can hold values which represent locale-specific
character mappings.

<dt><b>wctype_t</b><dd>As described in
<i><a href="wchar.h.html">&lt;wchar.h&gt;</a></i>.

</dl>
<p>
The
<i>&lt;wctype.h&gt;</i>
header
declares the following as functions and may also define them as macros.
Function prototypes must be provided for use with an ISO C
compiler.
<pre>
<code>
int       <a href="iswalnum.html">iswalnum</a>(wint_t);
int       <a href="iswalpha.html">iswalpha</a>(wint_t);
int       <a href="iswcntrl.html">iswcntrl</a>(wint_t);
int       <a href="iswdigit.html">iswdigit</a>(wint_t);
int       <a href="iswgraph.html">iswgraph</a>(wint_t);
int       <a href="iswlower.html">iswlower</a>(wint_t);
int       <a href="iswprint.html">iswprint</a>(wint_t);
int       <a href="iswpunct.html">iswpunct</a>(wint_t);
int       <a href="iswspace.html">iswspace</a>(wint_t);
int       <a href="iswupper.html">iswupper</a>(wint_t);
int       <a href="iswxdigit.html">iswxdigit</a>(wint_t);
int       <a href="iswctype.html">iswctype</a>(wint_t, wctype_t);
wint_t    <a href="towctrans.html">towctrans</a>(wint_t, wctrans_t);
wint_t    <a href="towlower.html">towlower</a>(wint_t);
wint_t    <a href="towupper.html">towupper</a>(wint_t);
wctrans_t <a href="wctrans.html">wctrans</a>(const char *);
wctype_t  <a href="wctype.html">wctype</a>(const char *);
</code>
</pre>
<p>
<i>&lt;wctype.h&gt;</i>
defines the following macro name:
<dl compact>

<dt>WEOF<dd>
Constant expression of type
<b>wint_t</b>
that is returned by several MSE functions to indicate end-of-file.

</dl>
<p>
For all functions described in this header that accept an argument of
type <b>wint_t</b>, the value will be representable as a <b>wchar_t</b>
or will equal the value of <b>WEOF</b>.  If this argument has any other
value, the behaviour is undefined.
<p>
The behaviour of these functions is affected by the LC_CTYPE
category of the current locale.
<p>
Inclusion of the
<i>&lt;wctype.h&gt;</i>
header may make visible all symbols from the headers
<i><a href="ctype.h.html">&lt;ctype.h&gt;</a></i>,
<i><a href="stdio.h.html">&lt;stdio.h&gt;</a></i>,
<i><a href="stdarg.h.html">&lt;stdarg.h&gt;</a></i>,
<i><a href="stdlib.h.html">&lt;stdlib.h&gt;</a></i>,
<i><a href="string.h.html">&lt;string.h&gt;</a></i>,
<i><a href="stddef.h.html">&lt;stddef.h&gt;</a></i>
<i><a href="time.h.html">&lt;time.h&gt;</a></i>.
and
<i><a href="wchar.h.html">&lt;wchar.h&gt;</a></i>.
</blockquote><h4><a name = "tag_000_010_719">&nbsp;</a>APPLICATION USAGE</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_010_720">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_010_721">&nbsp;</a>SEE ALSO</h4><blockquote>
<i><a href="iswalnum.html">iswalnum()</a></i>,
<i><a href="iswalpha.html">iswalpha()</a></i>,
<i><a href="iswcntrl.html">iswcntrl()</a></i>,
<i><a href="iswctype.html">iswctype()</a></i>,
<i><a href="iswdigit.html">iswdigit()</a></i>,
<i><a href="iswgraph.html">iswgraph()</a></i>,
<i><a href="iswlower.html">iswlower()</a></i>,
<i><a href="iswprint.html">iswprint()</a></i>,
<i><a href="iswpunct.html">iswpunct()</a></i>,
<i><a href="iswspace.html">iswspace()</a></i>,
<i><a href="iswupper.html">iswupper()</a></i>,
<i><a href="iswxdigit.html">iswxdigit()</a></i>,
<i><a href="setlocale.html">setlocale()</a></i>,
<i><a href="towctrans.html">towctrans()</a></i>,
<i><a href="towlower.html">towlower()</a></i>,
<i><a href="towupper.html">towupper()</a></i>,
<i><a href="wctrans.html">wctrans()</a></i>,
<i><a href="wctype.html">wctype()</a></i>,
<i><a href="locale.h.html">&lt;locale.h&gt;</a></i>.
<i><a href="wchar.h.html">&lt;wchar.h&gt;</a></i>.
</blockquote><hr size=2 noshade>
<center><font size=2>
UNIX &reg; is a registered Trademark of The Open Group.<br>
Copyright &copy; 1997 The Open Group
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